Yep our plugs are really good! For all of you wanting to try one just pick up a B6, you get one in the box for free ;-) Actually all kidding aside the primary cost involved in the manufacturing of a plug is in the element. I know this is hard to believe lol but the higher quality the plug, the higher the concentration (%) of platinum used in the element wire. We use pure platinum wire in ours and my costs actually go up and down every time I order based on the market price that platinum is trading at that day! So I guess what I'm trying to tell you is that if you are getting cheaper plugs, there is probably a reason and that is probably the low concentration of platinum in the element wire which makes them less durable and more prone to failure.

Regards,

Ron